Opel Frontera UBS. Service manual — part 932
1B–122 AIR CONDITIONING
Chart A: Magnet Clutch Does Not Work
NO
Replace the fuse.
NO
Replace the failed relay.
NO
Replace the electronic thermostat.
YES
Failure on the magnet clutch.
NO
The harness is disconnected.
NO
Failure on the power supply system.
YES
Is fuse C-20 (10A) normal?
Are relays normal?
YES
YES
Is the electronic thermostat normal?
YES
Turn the A/C (air conditioner) switch on.
Is the battery voltage present between the
chassis harness side connector terminal
No.1
and the ground?
E-27
NO
Is the battery voltage present between the
chassis harness side connector terminal
No.1
and the ground.
C-25
YES
NO
Failure on the pressure switch or refrigerant is
insufficient.
NO
The harness is disconnected.
Is the battery voltage present between the
chassis side relay terminal No.1
and the ground?
X-5
Are the pressure switch side connector
terminals No.1
and No.2
conducted?
C-25
C-25
YES
YES
Failure on the automatic heater/air
conditioner control unit.
NO
The harness is disconnected.
Is conduction provided between the
chassis harness side connecter terminals
No.1 and
No.4 ?
X-5
E-27
YES
Are the chassis harness connector
terminals No.14
and No.3
?
X-5
I-32
AIR CONDITIONING 1B–123
Inspection of the Air Conditioner Room Temperature Setup System
• Conflicts Between the Set Temperature and Actual Room Temperature
NO
Replace the failed sensor.
NO
NO
Failure on the automatic heater/air
conditioner control unit.
YES
YES
YES
Is the in car sensor intaking the room
air? (Refer to the later section on "Check
Up".)
Is the air mix link properly attached?
(Make sure that selecting FH or FC using
the lever respectively sets the mix door
to the full hot or full cool.)
Are the interior temperature sensor and
the outside air temperature sensor
functioning normally?
Failure on the in car sensor.
Failure on the air mix link or the actuator.
1B–124 AIR CONDITIONING
INDIVIDUAL INSPECTION
In Car Sensor
1. Disconnect the in car sensor connector (I-34).
2. Measure resistance between the in car sensor
side terminal No.3
and No.4
.
Sun Sensor
1. Disconnect the sun sensor connector (I-35).
2. Measure the current value on the sun sensor
when placed it approximately 15 cm away from
60W incandescent lamp.
Ambient Sensor
1. Disconnect the connector (C-86) on the ambient
sensor.
2. Measure resistance between the ambient
sensor side terminals.
I-34
I-34
Temperature on the Sensor
Temperature Detector(¡C)
Sensor Resistance
Value(k
‰
)
20 25 30
AUTO
4 3 2 1
-20
0
5
10
15
20
25
30
-10
0
10 20 30 40
17.09
9.93
3.75
2.24
6.0
1.6
30.69
865RX007
‰
0
10
0
-10
-20
30
40
20
5
10
15
20
25
30
Temperature on the Sensor
Temperature Detector(¡C)
Sensor Resistance
Value(k
‰
)
17.09
30.69
9.93
6.0
3.75
2.24
1.6
C01RX012
—
Testing rod
1
2
A
Current
value
40 A or more
+
1
2
2
1
D06RY00001
AIR CONDITIONING 1B–125
Power Transistor
1. Remove the power transistor connector (I-47)
from the evaporator assembly.
2. Check the conduction between the power
transistor side terminals.
MAX HI Relay
1. Remove the MAX HI relay connector (B-64) from
the blower assembly.
2. Check the conduction between the MAX HI relay
side terminals.
In Car Sensor
1. Turn on the ignition switch (the engine is
started). Start the air conditioner in "Full Auto".
2. Make sure that the in car sensor suctions
cigarette smokes and such.
3. Dismount the in car sensor from the automatic
heater/air conditioner control unit. Connect (+)
end and (-) end of the battery to the aspirator
motor side terminals No.1
and No.2
, respectively, then
check if the motor runs normally.
I-34
I-34
20 25 30
AUTO
4 3 2 1
C01RW020
4
3
3
4
1
2
2
1
No continuity between terminals (2) and (4).
Continuity between terminal (2) and (4) when battery
voltage is applied between (1) and (3).
C01RY00003
1
2
3
Terminal
No.
Conduction
Conducted (50‰ maximum)
Conducted (100‰ maximum)
Conducted (220‰ maximum)
Not conducted
Not conducted
1
−
2
3
Testing
rod
−
−
−
−
+
+
+
+
+
1
2
3
C01RY00002
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